Hao Li - publications [Factored Facade Acquisition using Symmetric Line Arrangements]

Factored Facade Acquisition using Symmetric Line Arrangements

FACTORED FACADE ACQUISITION USING SYMMETRIC LINE ARRANGEMENTS

Duygu Ceylan, Niloy J. Mitra, Hao Li, Thibaut Weise, Mark Pauly

Computer graphics Forum 31(2), Proceedings of the 33rd Annual Conference of the European Association for Computer Graphics 2012, 05/2012 – Eurographics 2012

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We introduce a novel framework for image-based 3D reconstruction of urban buildings based on symmetry priors. Starting from image-level edges, we generate a sparse and approximate set of consistent 3D lines. These lines are then used to simultaneously detect symmetric line arrangements while refining the estimated 3D model. Operating both on 2D image data and intermediate 3D feature representations, we perform iterative feature consolidation and effective outlier pruning, thus eliminating reconstruction artifacts arising from ambiguous or wrong stereo matches. We exploit non-local coherence of symmetric elements to generate precise model reconstructions, even in the presence of a significant amount of outlier image-edges arising from reflections, shadows, outlier objects, etc. We evaluate our algorithm on several challenging test scenarios, both synthetic and real. Beyond reconstruction, the extracted symmetry patterns are useful towards interactive and intuitive model manipulations.

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